wipe the value

choice1: a!radioButtonField(
              choiceLabels: cons!CR_APP_TXT_CHOICE_LABELS_YES_NO,
              choiceValues: cons!CR_APP_TXT_CHOICE_LABELS_YES_NO,
              choiceLayout: "COMPACT",
              value: fv!item.answer_txt,
              saveInto: if(
                contains(
                  index(
                    ri!crAPPRestructure_cdt.answer_txt,
                    wherecontains(
                      index(
                        local!SingleREFRestructure_cdt,
                        "dependentRefId_int",
                        {}
                      ),
                      ri!crREFRestructure_cdt.Id_int
                    ),
                    {}
                  ),
                  cons!CR_APP_TXT_CHOICE_LABELS_YES_NO[2]
                ),
                a!save(
                  fv!item.answer_txt,
                  null
                ),
                a!save(
                  fv!item.answer_txt,
                  fv!item.answer_txt
                )
                

              ),
              
              disabled: ri!IsReadOnly_bool,
              required: true(),
              requiredMessage: cons!CR_APP_RTF_TXT_VALIDATION_MSG
            ),
            choice2: a!integerField(
              value: fv!item.answer_txt,
              saveInto: 
              fv!item.answer_txt,
              disabled: if(
                or(
                  contains(
                    index(
                      ri!crAPPRestructure_cdt.answer_txt,
                      wherecontains(
                        index(
                          local!SingleREFRestructure_cdt,
                          "dependentRefId_int",
                          {}
                        ),
                        ri!crREFRestructure_cdt.Id_int
                      ),
                      {}
                    ),
                    cons!CR_APP_TXT_CHOICE_LABELS_YES_NO[2]
                  ),
                  ri!IsReadOnly_bool
                ),
                true(),
                false()
              ),
              readOnly: if(
                index(
                  local!SingleREFRestructure_cdt,
                  "readOnlyFlag_int",
                  {}
                ) = 1,
                true(),
                false()
              ),
              required: if(
                or(
                  index(
                    local!SingleREFRestructure_cdt,
                    "readOnlyFlag_int",
                    {}
                  ) = 1,
                  contains(
                    index(
                      ri!crAPPRestructure_cdt.answer_txt,
                      wherecontains(
                        index(
                          local!SingleREFRestructure_cdt,
                          "dependentRefId_int",
                          {}
                        ),
                        ri!crREFRestructure_cdt.Id_int
                      ),
                      {}
                    ),
                    cons!CR_APP_TXT_CHOICE_LABELS_YES_NO[2]
                  )
                ),
                false(),
                true()
              ),
              requiredMessage: cons!CR_APP_RTF_TXT_VALIDATION_MSG
            )

HI, 

here am getting these questions from db and populating in UI so have used choice in grid row layout 

requirement is when i select NO for 1st question the 1.1 data need to wipe/erase [their is one depended data i.e,dependent_id, based on that am differencing]

i have written the code but not meeting the requirement 

can anyone help with that?